I have tried dilution several times but its not helping, I am facing great problem in noting the end point as my sample is reddish in colour and the end point is slight pink in colour
PLEASE ADD SOME ACTIVATED CHARCOAL TO YOUR SAMPLE AND FILTER ATE, YOU WOULD GET COLORLESS SAMPLE AND PROCEED WITH THE TITRATION FOR THE DETERMINATION OF ASCORBIC ACID.
Try to pass your alumina or silica column first to get rid of reddish color in the samples.After elution from the column, the colorless eluent can be used for the titration.,But you need to correct the dilution factor too.